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104
• Check on the status LEDs
(08)
the shutdown command has been carried out (Missing DC voltage status): All LEDs OFF.
NOTE –
D
The time needed for the complete shut-down of the LEDs depends by the input voltage of the inverter. The complete shut-
down of the LEDs may require some minutes.
8.2.4.6 Operations on internal AC disconnect Switch (09) (only -S2, -SX2, -SY2 models)
NOTE –
D
This operation can be done only in case of wiring box -S2, -SX2, SY2 models. The wiring box Standard, -SX, SY models
doesn’t include the AC switch
(09)
.
• Open the main AC disconnect switch
(09)
(shown in blue in the picture below).
PV Strings
External DC
Switch
Internal DC
Switches
Internal AC
Switch
INVERTER UNIT
(Unit under service)
PWRMOD
WBOX
OPEN+LOTO
PV Strings
External DC
Switch
Internal DC
Switches
Internal AC
Switch
INVERTER UNIT
PWRMOD
WBOX
External LV
AC Switch
External Main LV
AC Switch
External LV
AC Switch
LV Distriubution
Panel
MW Switch
LV/MW
Transformer
OPEN+LOTO
OPEN
+
LOTO
• Affix designated lock preventing operation onto AC disconnect switch
(09)
, affixing designated tags (LOTO procedure).
8.2.4.7 Operations on Internal DC disconnect switches (15)
NOTE –
D
In case of absence of Internal DC disconnect switch (Standard Model) skip this step.
• Open all the internal DC switches
(15)
(1, 2 blue in the below picture).
PV Strings
External DC
Switch
Internal DC
Switches
Internal AC
Switch
INVERTER UNIT
(Unit under service)
PWRMOD
WBOX
OPEN+LOTO
PV Strings
External DC
Switch
Internal DC
Switches
Internal AC
Switch
INVERTER UNIT
PWRMOD
WBOX
External LV
AC Switch
External Main LV
AC Switch
External LV
AC Switch
LV Distriubution
Panel
MW Switch
LV/MW
Transformer
OPEN+LOTO
OPEN
+
LOTO
OPEN
+
LOTO
• Affix designated lock preventing operation onto all DC disconnect switches
(15)
, affixing designated tags (LOTO procedure).
• Check on the status LEDs
(08)
the shutdown command has been carried out (Missing DC voltage status): All LEDs OFF.
NOTE –
D
The time needed for the complete shut-down of the LEDs depends by the input voltage of the inverter. The complete shut-
down of the LEDs may require some minutes (see
on the inverter).